from django.shortcuts import render
from django_redis import get_redis_connection
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework.permissions import IsAuthenticated
from decimal import Decimal
from rest_framework.generics import CreateAPIView

from goods.models import SKU


# Create your views here.
from .serializers import OrderSettlementSerializer, SaveOrderSerializer


class OrderSettlementView(APIView):
    permission_classes = [IsAuthenticated]
    
    def get(self,request):
        user = request.user
        
        redis_conn = get_redis_connection("cart")
        redis_cart = redis_conn.hgetall("cart_%s" % user.id)
        cart_selected = redis_conn.smembers('cart_selected_%s' % user.id)
        
        cart = {}
        for sku_id in cart_selected:
            cart[int(sku_id)] = int(redis_cart[sku_id])

        skus = SKU.objects.filter(id__in=cart.keys())
        for sku in skus:
            sku.count = cart[sku.id]

        # 运费
        freight = Decimal('10.00')

        serializer = OrderSettlementSerializer({'freight': freight, 'skus': skus})
        return Response(serializer.data)
    
class SaveOrderView(CreateAPIView):
    """
    保存订单
    """
    permission_classes = [IsAuthenticated]
    serializer_class = SaveOrderSerializer


